以喷雾转化工艺(SCP)制备的纳米WC-10%Co(质量分数)粉为原料,应用脉冲放电烧结方法(EDC)制备出平均晶粒尺寸为120 nm左右的超细晶WC-Co硬质合金,并对样品的微观组织结构与力学性能进行了分析.结果表明,EDC方法极短的烧结时间是抑制晶粒长大的重要原因.除裂纹桥联机制外,弥散分布的小孔隙对提高WC-Co硬质合金的断裂韧性也起到重要作用.
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